Laundry detergent composition

Abstract

A liquid detergent composition containing a specific surfactant system and specific cyclic diamine.

What is claimed is: 
     
         1 . A liquid detergent composition comprising a surfactant system, the surfactant system comprising an anionic surfactant and a primary co-surfactant selected from the group consisting of amphoteric surfactant, zwitteronic surfactant and mixtures thereof wherein the anionic surfactant and the primary co-surfactant are in a weight ratio of less than 2.5:1 and wherein the composition further comprises a cyclic diamine of Formula(I): 
       
         
           
           
               
               
           
         
         wherein two of the Rs, are selected from the group consisting of NH2, (C1-C4)NH2 and mixtures thereof and the remaining Rs are independently selected from H, linear or branched alkyl or alkenyl having from 1 to 10 carbon atoms. 
       
     
     
         2 . A composition according to  claim 1  wherein the anionic surfactant and the primary co-surfactant are in a weight ratio of from about 2:1 to about 1:1. 
     
     
         3 . A composition according to  claim 1  wherein the anionic surfactant comprises an alkyl alkoxylate sulfate having an average alkoxylation degree of from about 0.2 to about 3. 
     
     
         4 . A composition according to  claim 1  wherein the anionic surfactant comprises a branched anionic surfactant having an average level of branching of from about 5% to about 40%. 
     
     
         5 . A composition according to  claim 1  wherein the co-surfactant is an amphoteric surfactant comprising an amine oxide. 
     
     
         6 . A composition according to  claim 1  wherein the surfactant system further comprises a secondary co-surfactant comprising a non-ionic surfactant. 
     
     
         7 . A composition according to  claim 1  wherein the surfactant system further comprises a secondary co-surfactant and wherein the weight ratio of the anionic surfactant to the primary and to the secondary co-surfactants is from about 1:1.0:25 to about 2:1:0.7. 
     
     
         8 . A composition according to  claim 1  comprising about 10 to about 40% by weight of the composition of the surfactant system. 
     
     
         9 . A composition according to  claim 1  having a pH from about 8 to about 10 as measured at 10% solution in distilled water at 20° C. 
     
     
         10 . A composition according to  claim 1  comprising from about 0.1 to about 5%, preferably from about 0.1 to about 2% by weight of the composition of the cyclic diamine. 
     
     
         11 . A composition according to  claim 1  wherein the remaining Rs, are selected from H, CH3 and mixtures thereof. 
     
     
         12 . A composition according to  claim 1  wherein the two Rs selected from the group consisting of NH2, (C1-C4)NH2 and mixtures thereof are in positions 1 and 3. 
     
     
         13 . A composition according to  claim 1  wherein the cyclic diamine is selected from the group consisting of: 
       
         
           
           
               
               
           
         
         1, 3-bis(methylamine)-cyclohexane, 
       
       
         
           
           
               
               
           
         
         2-methylcyclohexane-1,4-diamine, 
       
       
         
           
           
               
               
           
         
         4-methylcyclohexane-1,4-diamine, 
       
       
         
           
           
               
               
           
         
         Cyclohexane-1,2-diamine, 
       
       
         
           
           
               
               
           
         
         Cyclohexane-1,3-diamine, 
       
       
         
           
           
               
               
           
         
         Cyclohexane-1,4-diamine, 
       
       
         
           
           
               
               
           
         
         Isophoronediamine, and a mixture thereof. 
       
     
     
         14 . A composition according to  claim 1  wherein the cyclic diamine is selected from the group consisting of 1, 3-bis(methylamine)-cyclohexane, 2-methylcyclohexane-1,3-diamine, 4-methylcyclohexane-1,3-diamine and mixtures thereof. 
     
     
         15 . A composition according to  claim 1  wherein the anionic surfactant is an alkyl ethoxylated sulfate surfactant having an average degree of ethoxylation of from about 0.2 to about 3 wherein the primary co-surfactant is an alkyl dimethyl amine oxide, and further comprises a secondary co-surfactant wherein the secondary co-surfactant is an alkyl ethoxylated non-ionic surfactant comprising from about 9 to about 15 carbon atoms in its alkyl chain and from about 5 to about 12 units of ethylene oxide per mole of alcohol and wherein the cleaning amine is 1,3-bis (aminomethyl) cyclohexane. 
     
     
         16 . A composition according to  claim 1  wherein the anionic surfactant is an alkyl ethoxylated sulfate surfactant having an average degree of ethoxylation of from about 0.2 to about 3 wherein the primary co-surfactant is an alkyl dimethyl amine oxide, and further comprises a secondary co-surfactant wherein the secondary co-surfactant is an alkyl ethoxylated non-ionic surfactant comprising from about 9 to about 15 carbon atoms in its alkyl chain and from about 5 to about 12 units of ethylene oxide per mole of alcohol and wherein the cleaning amine is selected from the group consisting of 2-methylcyclohexane-1,3-diamine, 4-methylcyclohexane-1,3-diamine and mixtures thereof. 
     
     
         17 . A composition according to  claim 1  wherein the composition is a hand dishwashing detergent composition. 
     
     
         18 . A method of manually washing dishware comprising the steps of:
 i) delivering a detergent composition according to  claim 1  in its neat form onto the dishware or a cleaning implement;   ii) cleaning the dishware with the detergent composition in the presence of water; and   iii) optionally rinsing the dishware.   
     
     
         19 . The method of  claim 18  wherein the method provides grease cleaning in manual dishwashing. 
     
     
         20 . The method of  claim 19  wherein the detergent provides a good rinse feel in manual dishwashing.